3111213443 has 16 divisors (see below), whose sum is σ = 3448848480. Its totient is φ = 2805016032.

The previous prime is 3111213433. The next prime is 3111213481. The reversal of 3111213443 is 3443121113.

3111213443 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3111213443 - 2⁶ = 3111213379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3111213403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78005 + ... + 110937.

It is an arithmetic number, because the mean of its divisors is an integer number (215553030).

Almost surely, 2^3111213443 is an apocalyptic number.

3111213443 is a deficient number, since it is larger than the sum of its proper divisors (337635037).

3111213443 is an equidigital number, since it uses as much as digits as its factorization.

3111213443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33015 (or 32989 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 3111213443 is about 55778.2524197379. The cubic root of 3111213443 is about 1459.8557189943.

Adding to 3111213443 its reverse (3443121113), we get a palindrome (6554334556).

The spelling of 3111213443 in words is "three billion, one hundred eleven million, two hundred thirteen thousand, four hundred forty-three".